Standup sachets are an important part of the packs for chilli sauce in the current market. The square bottom sachet utilizes a folded gusset at the bottom, to hold more products. Then again, they will better present display when they stand on the goods shelves. Here, this chilli sauce square bottom sachet needs water boiling sterilization, so we should choose multi-layer pouches.
Based on a flexible combination of various polymer film materials, the foil materials can provide excellent barrier properties, protecting the chilli sauce from air, moisture, and light.
Besides, a creative artwork design can be printed on all sides of the standup packaging, including all the information for branding and sale, which makes the final package more attractive to consumers.
As a well-known flexible converter located in Qingdao, China, we are making the best use of the packaging film materials in the market, listed below.
- fossil chemical polymer films
- Aluminum foil metal sheet
- vacuum metalized film materials
- Ceramic film substrates
- plant-based biopolymer materials
- biodegradable film materials
- compostable substrate films
- Fully recyclable substrate films
We are devoted to creating story-telling standup screw cap bags for chilli sauce that increase product sales and establish a good brand image.
In this post, we will analyze the exact foil materials of this 450ml chilli sauce square bottom sachet for water boiling sterilization, hoping it could serve as a reference for your products.
Now, let’s get into the details of this chilli sauce square bottoom sachet film material.
Packaging Foil Materials
This film material is a reinforced structure with excellent properties for sauce packages. The foil structure is BOPP/VMPET/LDPE. The below graphic shows foil materials.
The film material of chilli sauce square bottoom sachet is made of triplex layers, with the outside BOPP film working as the print substrate film, VMPET film working as the middle supportive and barrier layer, and finally, the LDPE film working as the inner sealing layer. The thickness of the LDPE film should be adjusted to suit the requirements of 450g spicy chili sauce.
Next, We will talk further about each substrate film material.
BOPP Film
BOPP film is short for biaxially orientated polypropylene film, one of the most common print substrates in flexible packaging.
BOPP film can be produced using either a tubular process or a tenter frame process. In the tenter frame process, a thick extruded sheet is heated to its softening point and then mechanically stretched by 300–400%. So BOPP films have many advantages, including
- Clarity: Biaxially oriented films are very clear.
- Strength: They have high tensile properties and improved toughness
- Flexibility: They are more flexible
- Barrier properties: They have improved barrier properties
- Shrinkability: They can be made relatively easily shrinkable
VMPET Film
VMPET film is short for vacuum metallized polyester film, which is achieved under vacuum conditions to deposit a thin layer of aluminum atoms onto the surface of PET (polyester) film substrate. And finally, realize a bright metallic film that is widely used in flexible packaging and standup pouch packages.
The aluminum layer on the VMPET film is very fragile and may be damaged under heat or moisture conditions, not to mention water boiling sterilization. To meet the requirements for the pasteurization of chili sauce products, the aluminum layer will have to be protected with certain craftsmanship of anchor coating and top varnish. Below shows a typical structure of reinforced VMPET film intended for water boiling sterilization.
Read here for more knowledge of VMPET film.
LDPE Film
LDPE film is short for low-density polyethylene film, the most commonly used inner sealing film for multi-layer flexible packaging in various applications.
LDPE, is a thermoplastic polymer that is a member of the polyethylene family of plastics. It is known for its flexibility, toughness, transparency, and corrosion resistance.
LDPE is also lightweight, easy to fabricate, and has good chemical and impact resistance.
LDPE is nontoxic, non-contaminating, and has a high degree of break resistance. It’s also lightweight, corrosion resistant, and has good chemical and impact resistance.
These 3 layers are bonded together into a finished laminated foil material under the dry lamination or solvent-free lamination process. Usually, we describe the finished laminate as BOPP/VMPET/LDPE foil.
Thickness
As you can see below picture, the overall thickness of this spout pouch is 0.120 mm, which equals 120 microns for this laminated foil.
So, how does this foil structure perform when it is intended for chilli sauce standup packaging? Will it break during the transit?
Great Standup Effect
With the supportive middle layer of VMPET film, this triplex foil laminate is stiff enough to create a good standup effect for the packages up to 500 ml. As you can learn from the video below, the square bottom sachet presents a great standing profile for 450 ml chilli sauce.
Please note, BOPP/LDPE foil structure should not be taken to convert standup spout packaging, as it may be too soft to present a good standing profile.
Mechanical Property
The spout package will protect the chilli sauce product during filling, transit, and distribution. Under the emergency circumstances of unexpected shock in delivery or packages falling off the goods shelf, the spout package will never be allowed to break. Can you ever imagine the leaked chilli sauce contaminating the cartons or the floor?
We put the mechanical property of this 450ml chilli sauce standup sachet on our top priority in our manufacturing plant. Serious measures are taken in our QC system, to assure each order is finalized with the expected result.
To be short, a drop test of a filled package is one of the most reliable ways to check if the package may burst under sudden sharp forces.
Through the below video, you may learn the drop test of 16 oz roasted coffee beans package based on this triplex foil laminate BOPP18/VMPET12/LDPE.
As the adhesion of the aluminum metalized layer to the polyester film is low, the peel strength of this triplex foil BOPP18/VMPET12/LDPE is not so strong as the plastic laminates, such as PET/PA/LDPE or PA/LDPE. So, BOPP18/VMPET12/LDPE foil may be not strong enough for packages with a volume higher than 500ml, especially for liquid products.
At present, we are outputting the standup spout pouch with a maximum volume of 10 liters. The below video shows the drop test process of this package with 10 liters of liquids filled. You may have an actual understanding on its mechanical property. You may reach us with further ideas if you have any questions.
Barrier Performance
Usually, the barrier performance of a multi-material laminate is evaluated by WVTR (short for water vapor transmission rate) and OTR (Oxygen Transmission Rate). The below table shows the typical values of the WVTR and OTR of the most common substrate films in flexible packaging.
A sachet of great light-shielding properties would be preferred when the formula of the chili sauce contains volatile ingredients. Some tomato ketchup may be mixed with the chili sauce, which increase the requirements of barrier performance of this foil material. Based on our experience, BOPP/VMPET/LDPE foil laminate will be able to meet most of the requirements for chili sauce packages.
In the above picture, we are producing for our chilli sauce customers, which is fully opaque, and keeps the product in a fine situation even under daylight conditions.
Furthermore, WVTR (short for water vapor transmission rate) and OTR (Oxygen Transmission Rate) are evaluated for this laminated foil, with typical values listed in the below table.
| Item | Standard | Unit | Typical Value |
| Water Vapor Transimission Rate | ASTM E 96 | g/m2/24hr | 0.85 |
| Oxygen Transmission Rate | ASTM D 372-99 | cc/m2/24hr | 1.2 |
Furthermore, some reinforced foil structures are better packages to keep the freshness and flavors, with some available items listed below.
- PA/VMPET/LDPE
- PET/AL/LDPE
- PET/AL/CPP
- BOPA/AL/CPP
- PET/VMPET/LDPE
We will always come to assist whenever you need help with this product.
Technical Data Sheet of 450ml chilli sauce standing packaging
Here, we attach the specification sheet of the 450ml chilli sauce sahcet based on film material PET/VMPET/LDPE.
More tests are included in this specification sheet with items available listed as below.
- Yield (grams per square meter)
- Tensile Strength (Mpa)
- Elongation Rate (%)
- Coefficient of friction, short as COF
- Solvents Left (mg/m2 )
- Sealing Strength (N/15mm)
- Sealing Conditions
- Bond Strength (N/15mm)
- Burst Strength (J)
- Anti-Puncture ability (N)
- Drop Test Ability (cm)
- Anti-pressure ability (kgs)
- Water Vapor Transmission Rate (g/m2/24hr)
- Oxygen Transmission Rate (cc/m2/24hr)
If you want to learn more about this BOPP/VMPET/LDPE laminated foil, you can read it here.
More Sustainable Materials Options
Along with the increasing burden of fossil-chemical polymer materials discarded into our environment, there is an unprecedented demand for sustainable packages which leads to a more eco-friendly activity of the business. Upon the recent investigation of the chilli sauce market, more and more consumers are more likely to purchase a product that acts toward environmental sustainability.
Compostable Packaging Materials
The compostable packages are based on plant-based fibers like cellulose, or bio-mass like corn starch, cassava, or sugarcane. The resins derived from these resources are usually named bio-polymer, which can break down into inorganic elements under the functions of algae, bacteria, and other microorganisms.
At present, we have developed several compostable foil materials that can be intended for chilli sauce, with list as below.
- Cellulose/Metallized Cellulose/PLA+PBAT Film
- Cellulose/Metallized Cellulose/PBS Film
Fully Recyclable Mono Materials
Compared with the high cost of compostable foil materials, fully recyclable materials sachets, and rolls are flooding the market for lightweight product packages in the market at much lower prices. Mono materials packages mean each layer of the multi-layer foil is made of the same resin, which can be easily processed in the human recycling system and reused for other applications. This recyclable materials sachet largely reduces the rate of plastic polymer film packages ending in landfills.
Nowadays, we have developed some spout pouches based on single resin film materials, that can be found good application for chilli sauce products. Limited to the mechanical strength of current materials, the maximum volume for these recyclable pouches should be controlled under 250 ml.
That all. If you have any questions regarding chilli sauce pouches, please reach us. Have a good time.
